/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #334155;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: #2563eb;
}

.logo i {
    font-size: 28px;
}

.exam-code {
    background: #2563eb;
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.welcome-card, .results-card {
    background: white;
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    width: 100%;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Card Header */
.card-header {
    text-align: center;
    margin-bottom: 40px;
}

.exam-title {
    font-size: 28px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.exam-title i {
    color: #2563eb;
}

.exam-subtitle {
    font-size: 16px;
    color: #64748b;
    font-weight: 500;
}

/* Exam Details */
.exam-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
    padding: 30px;
    background: #f8fafc;
    border-radius: 16px;
    border: 2px solid #e2e8f0;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.detail-item i {
    font-size: 20px;
    color: #2563eb;
    width: 24px;
}

.detail-item strong {
    color: #1e293b;
    font-weight: 600;
}

/* Instructions */
.instructions {
    margin-bottom: 40px;
}

.instructions h3 {
    font-size: 20px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.instructions h3 i {
    color: #2563eb;
}

.instructions ul {
    list-style: none;
    padding-left: 0;
}

.instructions li {
    padding: 12px 0;
    border-bottom: 1px solid #e2e8f0;
    position: relative;
    padding-left: 24px;
}

.instructions li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

.instructions li:last-child {
    border-bottom: none;
}

/* Student Form */
.student-form {
    margin-bottom: 40px;
}

.student-form h3 {
    font-size: 20px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.student-form h3 i {
    color: #2563eb;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #374151;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: white;
}

.form-group input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input:invalid {
    border-color: #ef4444;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    justify-content: center;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: #64748b;
    color: white;
}

.btn-secondary:hover {
    background: #475569;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(100, 116, 139, 0.3);
}

.btn-success {
    background: #10b981;
    color: white;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
}

.btn-warning {
    background: #f59e0b;
    color: white;
}

.btn-warning:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245, 158, 11, 0.3);
}

.btn-danger {
    background: #ef4444;
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.3);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Results Page Specific */
.success-icon {
    text-align: center;
    margin-bottom: 30px;
}

.success-icon i {
    font-size: 80px;
    color: #10b981;
    animation: bounceIn 0.8s ease-out;
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.results-card h1 {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 8px;
}

.subtitle {
    text-align: center;
    font-size: 18px;
    color: #64748b;
    margin-bottom: 40px;
}

.submission-details, .answer-summary, .objective-score, .next-steps {
    margin-bottom: 40px;
}

.submission-details h3, .answer-summary h3, .objective-score h3, .next-steps h3 {
    font-size: 20px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.submission-details h3 i, .answer-summary h3 i, .objective-score h3 i, .next-steps h3 i {
    color: #2563eb;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail-item label {
    font-weight: 500;
    color: #64748b;
    font-size: 14px;
}

.detail-item span {
    font-weight: 600;
    color: #1e293b;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
}

.summary-item {
    text-align: center;
    padding: 20px;
    background: #f8fafc;
    border-radius: 12px;
    border: 2px solid #e2e8f0;
}

.summary-number {
    font-size: 32px;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 8px;
}

.summary-label {
    font-size: 14px;
    color: #64748b;
    font-weight: 500;
}

.score-display {
    text-align: center;
}

.score-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.score-circle small {
    font-size: 16px;
    opacity: 0.8;
}

.next-steps ul {
    list-style: none;
    padding-left: 0;
}

.next-steps li {
    padding: 12px 0;
    border-bottom: 1px solid #e2e8f0;
    position: relative;
    padding-left: 24px;
}

.next-steps li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #2563eb;
    font-weight: bold;
}

.next-steps li:last-child {
    border-bottom: none;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .welcome-card, .results-card {
        padding: 20px;
        margin: 10px;
    }
    
    .exam-title {
        font-size: 24px;
        text-align: center;
    }
    
    .exam-details {
        grid-template-columns: 1fr;
        padding: 20px;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .header-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
    }
    
    .summary-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}